“…Significant enhancement of conductivity has been observed in polycrystalline LFPO doped with Mg, Ni, Co, Nb, Zr, and Ti. 3,4 However, the underlying mechanisms for the enhancement are still very controversial and not fully understood, as some conductive impurities were found in the doped LFPO polycrystalline powders and bulks. 5 On the other hand, the LFPO compound also exhibits interesting electric structures and magnetic properties, such as spin polarization 6 and one-dimensional antiferromagnetism along the ͑010͒ direction.…”